﻿#region copyright

//------------------------------------------------------------------------------
//  此代码版权声明为全文件覆盖，如有原作者特别声明，会在下方手动补充
//  此代码版权（除特别声明外的代码）归作者本人Diego所有
//  源代码使用协议遵循本仓库的开源协议及附加协议
//  Gitee源代码仓库：https://gitee.com/diego2098/ThingsGateway
//  Github源代码仓库：https://github.com/kimdiego2098/ThingsGateway
//  使用文档：https://diego2098.gitee.io/thingsgateway-docs/
//  QQ群：605534569
//------------------------------------------------------------------------------

#endregion

namespace ThingsGateway.Foundation.Adapter.Siemens;

/// <inheritdoc/>
internal class SiemensMessage : MessageBase, IMessage
{
    /// <inheritdoc/>
    public override int HeadBytesLength => 4;

    /// <inheritdoc/>
    public override bool CheckHeadBytes(byte[] heads)
    {
        HeadBytes = heads;
        byte[] headBytes = HeadBytes;
        if (headBytes == null || headBytes.Length < 4)
            BodyLength = 0;
        int length = (HeadBytes[2] * 256) + HeadBytes[3] - 4;
        if (length < 0)
            length = 0;
        BodyLength = length;
        return HeadBytes != null && HeadBytes[0] == 3 && HeadBytes[1] == 0;
    }
}